The ServoCity 5103 Series Planetary Gearbox (71.2:1 Ratio, 24mm Length 8mm REX™ Shaft) serves as a direct replacement for the gearbox in the 5203-2402-0071 Yellow Jacket Planetary Gear Motor. This gearbox is designed with a robust 8mm REX output shaft, making it compatible with various 8mm REX components. It features the goBILDA pattern on its face, which facilitates integration with other components, and includes clearance cuts to accommodate nearby parts. The gearbox is engineered to deliver reliable performance and durability, ensuring it meets the demands of various applications. Its compact design and innovative features make it a versatile choice for those seeking a high-quality planetary gearbox solution.